Whistle control valve



oct. 25,1927. 4 mmm 1,646,640 vWHISTLE CONTROL VALVE Filed De?. 2. 192*1- lin' ifi-g1. -g 30 %Hu :en im f f Z5 75/ rk x f5. 7. 'gfv .-lllwhistle fram Boiler 5 T L l 5.1M

Rage-rs Waniel,

Patented Oct. 25, 1927.

UNITED STATES ROGERS W. DANIEL, OF INDIANAPOLIS, INDIANA.

WHISTLE CONTROL VALVE.

Application led December 2, 1926. Serial No. 152,208.

My said invention relates to valves and more particularly tothe Whistlevalves of locomotives 0r other vehicles using fluid res- Asure whistles.v The steam whistles vo the present time are usually connected directlyto a pipe leading from the steam dome and are provided with an integralvalve mounted beneath the bowl and operated by a system of rods andlevers which finally become worn out or are shaken loose causing con-Asiderable loss motion and also leakage of steam. Also the whistle islocated in a position that should it become broken, it is necessary todraw the fire and blovv7 oil. the steam in order to replace a new one.It is therefore an object of my invention to overcome theseditiic-ulties by placing the valve in a vconvenient point` in the caband entirely eliminating the levers and rods usually required to operatethe whistle and using every particle of steam at the whistle bowlwithout any possibility of leakage.

Referring to the accompanying drawing forming a- -part hereof, and inwhichA like numerals designate similar parts in the views of which:

Figure 1 is a vertical sectional view 4 through my improved valve,

Figure 2, a diagrammatic view 4of the connections of the valve andwhistle, and

Figure 3, a diagrammatic view of a modied arrangement thereof.v

In the drawings; the numeral 10 designates the main valve body, 11 thecylinder and 12 the control valve casing. The body 10 has an inletopening 13 which receives the vsteam from the usual steam dome 14Athrough a pipe 15, and an exhaust opening 16 which isv connected by apipe 17 to any suitable form of whistle 18 shown in Fig. 2. A valve seat19 is formed in the body lOvand receives a relatively-small valve20Vsecured on the end of a piston rod 21- which extends upward through abearing'sleeve 22 into the cylinder 11. A large piston 23 is secured tothe upper end of the rod 22 and controls the movement of the valve 20.Interposed between the lower side ofthe piston 23 and the base of thecylinder 11 is a' spring 24 which no-rmally tends to force the pistonupward and open the valve as will be hereinafter more fully explained.

A small port 25 leads from the inlet opening 13 up through the body ofthe cylinder 11 and communicates with the cylinder at a point above theupward limit of movement of the piston 23. The steam entering throughthe inlet opening 13 will exert pressure beneath the valve 20, but thesame pressure passes through the port 25 to the chambei-p11 above thepiston 23 which has a much larger area than the valve 20, therebycompressing the spring 24 and maintaining the valve 20 closed. Thisvalve will remain closed as long as the pressure is maintained in thechamber 11 above the iston 23.

The pressure in the cham er 11 is governed by a control valve whichcomprises a ball26 mounted in a tube 27 which communicates with thechamber 11', said ball being normally held against a seat 28 by means ofthe steam pressure and also a spring 29. The tube 27 with its ball valveis located within a chamber 30 formed by the easing 12 and a cover plate31. A plunger 32 is slidably mounted in the cover plate 31 directly overthe ball 26 and is normally held upward away from the ball by a spring33 interposed between the top of the plate 31 and a head 34 forme-d onthe plunger. The upward movement of the plunger 32 is limited by meansofv a pin 35 which strikes the under side of the plate 31.

In order to drain the chamber 3() and also cause a more rapid movementof the p1ston 23, a port 36 leads downward through the casing 12 andcylinder 11 and into a chamL -ber 37 which surrounds a venturi mountedinthe exhaust opening 16 of thevalve body` This venturi is provide-dwith a central throat 38 through which the. major portion of the steampasses and a series of small openings 39 through which is siphoned thesteam from the chamber 30. .In this way all of the steam is utilized inblowing the whistle as it is impossible for-any leakage of waste.

The operation is as follows: In Fig. 1 of the drawings the parts are inthe' position assumed when under pressure. When it is desired to blowthe whistle, pressure is exerted downward on the plunger 32' unseatingthe ball valve 26 which relieves the pressure in the chamber 11 allowingthe spring 24 to force the piston 23 upward.

`This movement opens the valve 2O which seats itself against the underside of the bushing 22 and permits the steam to pass di rectly from theboiler to the whistle. The passage of the steamthrou h the venturi,

siphons the steam from the c amber 30 at a greater vspeed than it wouldordinarily flow thereby creating'a partial vacuum 1n the my devicewithout departing from the spirit v chamber 11 and causing a rapidmovement of the piston 23 and valve 20.

In Fig. 3 of the drawings is shown a modified arrangement of thedevicein which lthe control valve 26 is shown separated from the mainvalve cylinder 11 and connected thereto by a tube 40. The port 36 isalso replaced by a tube which connects to the chamber 37. In thisarrangement the control valve can be. mounted in a convenient locationvinside of the cab and the main valve parts may beplaced outside.

The device as here shown and described is operated by direct manualpressure on the head 34 of the plunger 32, but I wish to have itunderstood that other operating means as electric orY pneumatic meansmay be used instead if preferred. When the device is manually operated,the control valve would necessarily be located within reach of theoperator, whereas, with electrical or pneumatic operation, the controlValve may e placed in any convenient location with the operators switchor other medium within easy reach,

It will be obvious to those skilled in the art, that various changes maybe made in of my invention, and therefore I do not Wish to be limited tothe exact structure described and shown, but only as indicated in thevappended claims.

Having thus fully described in said in-` desire tov vention, what Iclaim as new an secure by Letters Patent, is:

1. A quick acting fluid pressure control yalve comprising a main valvecasing having an inlet and an exhaust port, a valve between said ports,an auxiliary casing detachably' connected to said main valve casing, aiston in said casing having a connection with said valve for controllingthe same,

a passage through said main valve casing, a passage through saidauxiliary valve casing, said passages forming communication between theinlet port and said casing at the remote vside of the piston, an annularchan- 'nel 1n one of said valve casings in communication with saidpassages to permit the passage of Huid therethrough in any relativeposition of rotation of the contiguous parts, a detachable closure forthe outer end of said auxilia sure, a relie valve mounted in saidchamber, a .manually controlled plunger for opening said relief valve,and a drainage passage age passage casing, a chamber in said clo.

and twenty-six.

forming communication between said chamber and exhaust port,substantially as set forth.

prising a main valve casing having an inlet and an exhaust port, a valvebetween said ports, an auxiliary casing detacliably connected to saidmain valve casing, a piston in said casing having a connection with saidvalve for controlling the same, a passage through said main valvecasing, a passage through said auxiliary valve casing, said passagesforming communication between the inlet port and said casing at theremote side of'the piston, a detachable closure .for the outer end ofsaid auxiliary casing, a chamber in said closure, a relief valve mountedin said chamber, a manually controlled plunger for opening said reliefvvalve, a venturi on the discharge side of the main valve, and a drainagepassage forming communication between the said chamber and a region oflow pressure in the venturi whereby passage of steam through the mainvalve and the venturi will create a reduced pressure inthe said passageand in the chamber above the piston, substantially as set forth.

3. A fluid pressure controlled valve comprising a main valve casinghaving an inlet and an exhaust port, a valve between said ports, anauxiliary casing detacliably connected to said main valve casing, apiston in said casing having a connection with said valve forcontrolling the same, a passage through said main valve casing, apassage through said auxiliary valve casing, said passages formingcommunication between the inlet port and said casing at the remote sideof the piston, a detachable closure for the outer end of said auxiliarycasing, a A

chamber in said closure, a relief valve mounted insaid chamber, meansfor operating said relief valve, a venturi on the discharge side of themain valve, anda drainforming communicationl between the said chamberand a region of low pressure in the venturi whereby passage of steamthrough the main valve and the venturi will create a reduced pressurein` the said passage and in the chamber above the piston, substantiallyas set forth. n

In witness whereof, I have lhereunto set myhand at Indianapolis,Indiana, this 30th day of November, A. D. nineteen hundred

